Utilizing exhaust-steam



H. T. LITGHFIELD-Zi: D. RENSHAW.

' UTILIZING EXHAUSTJSTEAMi Patented-1111166, 1882.

UNITED STATES HARVEY T. LITOHFIELD, OF

PATENT OFFICE.

HULL, AND 'DAVID RENSHAW, OF GOHASSET, MASSACHUSETTS.

UTILIZING EXHAUST-STEAM.

SPECIFICATION forming part of Letters Patent No. 258,932, dated June 6, 1882.

Application filed August 9, 1881 (No model.)

To all whom it may concern:

Be it known that we, HARVEY T. LITOH- FIELD, of Hull, county of Plymouth, and DA- VID BENSHAW, of Cohasset, in the county of Norfolk, and all of the State of Massachusetts, have invented a new and useful Improvementi n the Process of Utilizing Exhaustbteam, of which the following is a specification.

Our invention relates to animprovement in the process of utilizing exhaust-steam; and the invention consists in taking water from a boiler and forcing the said water by pumps or other suitable means under great pressure .giue B with boiler A.

E represents a pump, of which there may be two or more, the steam ends of which are connected with boiler A by steam-pipe F.

G is an exhaust-pipe connected with the pumps, and leadlng into the main exhaustpipe D.

H is a tank connected with the pump E by pipes 1 and J. The pump or pumps are also connected with the boiler by means of pipes J and K, delivering into pipe M, and from thence passing into exhaust-pipe D through a jet-pipe, L.

The operation is as follows: Steam being raised in the boiler A to the required workingpressure, the pumps are started, causing a jet of water to be delivered from the jet-pipe L under great pressure. The engine B is then started, the exhaust from which is carried back through exhaust-pipe D to the boiler A by the action of the jet of water issuing from jet-pipe L. I

It will be evident that in this process there may be two or more pumps so arranged as to make the pressureand feed to the jet-pipe steady and continuous.

By closing valve N and feeding pumps E from the tank H, or its equivalent, cold water can be forced into boiler A, and so make good 1 any loss by leakage or other cause.

In the accompanyin g drawing the exhaustpipe D is shown as entering the boiler A above the water-line but in general practice it may be found advisable to enter it below the wadrawing or pumping water from a working boiler, then forcing it under greater pressure than the boiler-pressure into the exhaust-pipe of an engine, whereby the water and the exhaust of the engine is forced into the same boiler from which they were taken, substau: tia-lly as described.

2. The combination, in an apparatus for utilizing the exhaust of engines, the boiler A, cylinder B,-pump E, with their supply and exhaust pipes, the tank H, and pipes I, J, M, and D, whereby water may be fed to the boiler for leakage and supply, in the manner set forth and described.

In testimony whereof we have signed our names to this specification in the presence of 

